Improvement in organ-pipes



.the aforesaid cylinder.

UNITED STATE-s PATENT OFFICE.

GEORGE H. BROOK, OF HUNTINGTON, NEW YORK.

IMPROVEMENT IN ORGAN-PIPES.

Specification forming part of Letters Patent No. 81,59 l, dated September 1, 1868.

To all whom 'it may concern:

Be it known that I, GEORGE H. BROCK, of Huntington, in the county of Suffolk and State of New York, have invented a new and useful Improvement in Organ -Pipes; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents a transverse vertical section of my improved organ-pipe. Fig. 2 is a plan or top view of the same.

Similar letters of reference indicate like parts.

This invention relates to a new manner of constructing organ pipes; and consists in making each pipe of a curved plate, held be tween two disks. In this manner amore substantial, solid, effectual, and a cheaper pipe is obtained than could ever be produced according the old plan now in use.

A in the drawing represents a sheet-metal or other plate, bent into nearly a circular form, but so thatits ends do not touch. It is held between two sheet-metal or other fiat disks or plates, B B, forming, in connection with them, a cylinder, perforated through the rim. C represents the bottom of the wind-blast. It is fitted above the opening in the periphery of a a are the perforations through the plank C. They are covered by the valves, that can be raised by the lingen keys.

Under each perforation is attached, to the plank O or to the cylinder, an inclined plate, D, which carries the wind against the end b ofthe plate A. Thus when a valve is raised the wind is blown into t-he corresponding aperture a, and is, between the plate D and the bottom of the plank O, guided against the edge b, and vibration is thus produced. The longe-r the plate A, the deeper will be the tone produced; and if the other end, c, of the plate A, is carried against the plank C, as shown in Fig. l, the tone will be still deeper.

That portion of the air blown against the edge b which enters the inside of the cylinder moves along the interior of the plate A, and would return again to the edge b unless it were prevented from doing so. A pendent plate, d, is therefore secured to the plate D, to prevent such air from returning to the mouth of the pipe.

When a series of such pipes is arranged alongside of each other, as in Fig. 2, every plate 'B will act as a side wall for two contiguous pipes. The pipes are thus made very substantial, and cannot shake, or yield, or be irritated as muchas the straight pipes now in use.

It is evident, that instead of being bent in circular form, the plate A may be bent into an oval or spiral form, or beotherwise curved. The pipes thus made are much more compact and condensed than the ordinary straight pipes. They can be made cheaper, as they need no separate side walls, and an organ consisting of my pipes is portable, and can be moved easily from place to place, while with the straight pipes no organ could be made portable.

The tone in the condensed pipes will be firmer and better than in the shaking, long pipes. The shakingof these lon gpipes changes the tone, which inconvenience is also overcome by my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Pat ent l. Constructing an organ-pipe of a curved plate, A, held between the disks B, as set forth.

l 2. The plate D, for guiding the wind from the wind-chest against the mouth of a curved organpipe, as specified.

3. The pendent arrester d, arranged in the curved organ-pipe, substantially as and for the purpose herein shown and described.

G. H. BROOK. lVitnesses:

W. A. CoNANT, WM. L. CONANT. 

